Or. Admin. R. 660-046-0130
Conversion of an existing detached single-family dwelling to a Duplex is allowed, pursuant to OAR 660-046-0105(2), provided that the conversion does not increase nonconformance with applicable clear and objective standards in the Medium City’s development code, unless increasing nonconformance is otherwise allowed by the Medium City.
ORS 197.040
ORS 197.758